| 摘要 |
PROBLEM TO BE SOLVED: To provide an electroless gold plating solution giving the high precipitation rate of gold, and having excellent stability even in neutral conditions and at low temperatures. SOLUTION: The electroless gold plating solution contains a gold salt, a reducing agent expressed by general formula (I) and a heavy metal salt; in the formula, R<SP>1</SP>is a hydroxyl group or an amino group; and R<SP>2</SP>, R<SP>3</SP>and R<SP>4</SP>are each individually a hydroxyl group, an amino group, a hydrogen atom or an alkyl group. COPYRIGHT: (C)2007,JPO&INPIT
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